Method of weaving ladder web and packaging the same



Dec. 24, 1940. e. E. COLBY 2,226,093

METHOD OF WEAVING LADDER WEB AND PACKAGING THE SAME Filed Aug. 30, 19396 to 58% "a ,3

INVENTOR.

ea/y'e Efoffy B'Yfl g A TTORNEYS.

Patented Dec. 24, 1940 METHOD OF WEAVING LADDER WEB AND PACKAGING THESAME I George E. Colby, East Providence, It. I.,-assignor toInternational Braid Company, a corporation of Massachusetts ApplicationAugust 30, 1939, Serial No. 292,685

3 Claims.

This invention relates to a ladder web construction where the exteriorfaces of the two main webs diner in color characteristics, the websbeing connected together by cross members, and this invention has forone of its objects an arrangement of the main webs so that the slatscarried by the cross members may be satisfactorily closed when theladder construction is utilized in a Venetian blind.

Another object of the invention is to provide a ladder web constructionhaving webs of different colors. one of which colors is a light color tobe placed on the outer side of .the Venetian blind and the other web ofwhich is a darker color designed to be placed on the inner surface ofthe Venetian blind for the harmonizing in different room color schemes,with an arrangement between these two main webs so that they will besubstantially equal in length or if any variation occurs this variationwill be such as to provide the lighter colored tape longer in length toprovide proper closing of the blind by tilting of the slats thereof. I

Another object of the invention is to arrange for this proper lengthcharacteristic of the main webs by the packaging of the ladderconstruction in a form so that the lighter colored web will be on theoutside of the package or roll azfd thus will maintain a greater radiusfor any angle of are and thus a greater length than its companion web ofdarker color.

Another object of the invention is to arrange for the proper lengthcharacteristic of the main webs both by the tension or take-up of thewarps :,in the main webs and the packaging of the'ladder webconstruction as it is taken from the loom.

' With these and other objects in view, the invention consists ofcertain novel features of construction, as will be more fully described,and particularly pointed out in the appended claims.

In the accompanying drawing:

Fig. 1 is a side elevation of a ladder web construction supporting thecross slats of a Venetian blind;

Fig. 2 illustrates this blind in partially closed position;

Fig. 3 illustrates schematically the weave arrangement of the ladderconstruction;

Fig. 4 illustrates diagrammatically the travel of the warps in the loomand the rolling of the same; and

Fig. 5 illustrates a package of woven ladder construction.

In the hanging of Venetian blinds where ladderweb having two main websof different color characteristics is used, difliculty is oftenexperienced because the workman hanging the blind does not have theoptio nto shift the ladder web from side to side or end to end as wherethe main webs are both of thesame color characteristics as he must forproper hanging place the light colored web on the outside of the blindand the dark colored main web on the inside of the blind for colormatching of the room, and if the main webs are not of the same length orthe dark web is longer, the blind will not properly close. At thepresent time it will be noted on the market that it is the custom topackage ladder web construe tion in rolls with the. dark colored web,where two colors are used, on the outside. In order to ob'viate thisdifficulty, I have arranged to place different tensions on the webs ofdifferentjcolors with the greater tension on theweb of light color andto package this ladder construction with the light colored web on theoutsideand the dark colcred web on the inside sothat if there beanydifference in length, by reason of the packaging, the lighter coloredweb will be the longer and vthe blind will properly close, and thefollowing is a more detailed description of the present embodiment ofthis invention, illustrating the preferred means by which theseadvantageous results may be accomplished:

With reference to the drawing, I have illustrated an integrally wovenladder construction consisting of a main web I0 of light color and amain web ll of dark color. The cross members l2 consist of warp threadssome of which are of the color of the main web It) and some of which areof .the color of the main web II. The warp threads l3 corresponding incolor to the main web III as illustrated in Fig. 3 are woven into thismain web and the warp threads H which are of the color corresponding tothe web II are woven into the web II. The wefts such as l6 are all ofone color which may be the color of-either of the two webs. Thisarrangement is more fully disclosed in my co-pending application, SerialNo. 266,951, filed April 10, 1939.

In weaving this woven ladder formation the warp threads of the lightcolor in main Web ID i will be placed under less tension and thereforehave more take-up than the warp threads of the darker color main web IIand this difference in tension and take-up will be such that for averageconditions of atmospheric moisture and other conditions which changedimensions of textiles, a shrinking will occur greater in the darkcolored fabric .than in the lighter colored fabric after the same comesfrom the loom so that the main webs will be of substantially equallength.

' colored main web ll approximately seventy-five units of weight will beplaced upon the warp yarns of the lighter colored main web N. In

' other words, this would beapproximately the proportion which would beright in the average ladder web construction being made in accordancewith this invention at the present time. It is to be understood thatthis amount may be varied. however, in accordance with the requisitesabove, which I have pointed out.

In the diagrammatic showing in Fig. 4 the warp yarns I8 which form thelight colored main web ;III are drawn from a warp beam (not-shown) aboutasuitable guide roll l9 while the warp yarns .20 of the main web Ii aredrawn about a suitable guide roll 2| from a warp beam 22. These webs aswell as the cross tapes are woven in the loom by manipulation of theharnesses 23 and the webs together then pass over the breastbeam 2, sandroll 25, guide roll 26, to be packaged as at 21. The light main web Hiis on the outside as the tape passes ,over .thesand roll 25 where thewebs are under tension-and any extension may occur. The reeling at 2! isunder. little or no tension.

From this reeling the web is unrolled .and"

clipped to sever certain portions of the ladder members and then whenrepackaged as shown. at .28 the light colored web I0 is on the outsideas on the sand roll and the dark colored web II is on the inside. allbeing wound upon asuitable core 29. In this manner any stretchwhen theweb is hung and thus exposed to moisture shrinkage can occur and willoccurto a greater extent in the light colored web which was woven undergreater tension and with less;

However,

; ored web on the outside take-up than in the dark colored web and un-"der average conditions a suitable adjustment will be such that thesewebs will assume substantially the same length. The longer length,however, from the beginning is in the light colored outer we'b affordingat all times proper closing of the slats 29 of the blinds which willcause andnclination oi the slats as shown in Pig. 2,

The foregoing description is directed solely towards the constructionillustrated, but I desire it to be understood that I reserve theprivilege of resorting to all the mechanical changes to which the deviceis susceptible.

I claim: v

1. ,A rolled package of a band of integrally wovenladder constructioncomprising a pair of web structures, one of light color and another 7the outer side of the rolled package whereby it is disposed along agreater radius and thus along a greater extent for any angle of a clthanthe darker-colored web. a

2. The method or providinga lad deriweb pack age oi. difierently coloredwebs, which consists" members woven to connect said two webs, and

in' so' weaving providing substantially greater warp tension on thewarps-oi the web of dark I color thanon the corresponding warps of thelight color. :3. The method of providing a ladder web package ofdifferently colored webs, which consists in weaving two webs ofdifferent colors, one light color and one of dark color with laddermembers woven to connect said two webs, and in so weavingapplyingsubstantially less warp tension :ori the warps of the web oflight color than on the corresponding warps of the dark color, androlling said woven structure with the light colof said roll.

GEORGE E, COLBY;

in weaving two webs of diflerent'colors, one t light color and one ofdark color with ladder

